In my experience, SME will disagree with your dispute and appealing this will result in a copyright strike. The copyright strike can be disputed, but this takes weeks before they eventually back off. My advice is either slowly but surely deal with a copyright strike at a time so your account doesn't get banned, or just accept the claim which results in there being adverts on your video and eventually there'll be a mass-review and the claim will go away on its own.

Sony are kinda bastards about this sort of thing, you have to force them to sue you, or accept their claim.